Home / 12,802.30-19,215.60-7,881.55

Finding the Fourth Proportional to 12,802.30, 19,215.60 and 7,881.55

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Solution

The fourth proportional to 12,802.30, 19,215.60 and 7,881.55 is: 11,829.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,802.30 : 19,215.60 = 7,881.55 : x
  2. Step 2: Convert to fraction form
    12,802.30/19,215.60 = 7,881.55/x
  3. Step 3: Cross multiply
    12,802.30x = 19,215.60 × 7,881.55
  4. Step 4: Simplify right side
    12,802.30x = 151,448,712.18
  5. Step 5: Solve for x
    x = 151,448,712.18/12,802.30
  6. Step 6: Final answer
    x = 11,829.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.